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From YouTube: WebPerfWG call - 2023 03 02 - Long Animation Frames
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A
The
this
is
from
having
frustration
with
a
gap
between
seeing
that
there
are
responsiveness
issues
and
reflecting
it
with
things
like
rnp
and
being
actually
able
to
act
on
them
and
fix
them
and
understanding
why
they
happen
and
when
I
started.
This
I
was
looking
at
the
what
we
say
about
npn.
A
We
were
telling
people
okay,
look
at
your
long
tasks,
take
your
lung
taxi
and
try
to
break
long
tasks
so
that
you
aren't
doing
better
and
then
I
tried
myself
to
use
long
tasks
and
I
found
that
they
actually
don't
give
you
enough
information
in.
A
A
A
A
That's
why
I
was
looking
at
what
we
should
actually
be.
Measuring
and
I
came
up
with
this
long
animation
frame,
they're,
actually
all
their
proposals
that
I
was
building
on
for
long
frames
and
for
a
long
task
attribution
from
Nicolas
and
the
previous
people
on
the
team,
and
this
is
kind
of
a
revamp.
A
A
There
could
be
usually
one
or
two
tasks
there.
There
could
be
more
depending
on
how
the
scheduler
works,
but
in
general
it's
about
it's
about
one
or
two
tasks,
and
currently
it
could
be
three,
but
the
idea
that
from
dominated
it's
idle
until
the
user
agent
is
ready
to
paint,
and
that
would
be
a
long
animation
frame.
A
So
if
you
split
your
work
between
a
set
timeout
and
the
subsequent
request,
animation
frame,
it
would
appear
as
one
long
thing
Etc
the
other
big
change
or
addition
is
a
script
entry
points
yeah.
So
you
can
also
see
that
in
explainer,
and
the
idea
is
that,
in
addition
to
showing
you
that
there
were
long
animation
frames,
we
show
you
a
list
of
long
scripts
right
now.
A
long
script
is
five
SEC,
millisecond
or
more
might
be
10
or
a
different
number.
A
You
have
to
play
with
the
magic
number
there
of
the
script
that
were
there
in
the
long
animation
frame
the
source
of
the
scripts.
Perhaps
the
line
and
call
number
where
it
came
from
like?
Is
it
an
event
handler?
Is
it
a
promise?
Resolver?
Is
it
user
callback
like.
A
This
is
an
actual
script
to
look
like
a
script
element
or
an
import,
and
there
are
other
scripted
entry
points
like
descriptor
script,
URLs
and
other
things.
That
are
not
that
much
news,
but
the
idea
is
to
focus
on
to
focus
on
the
script
entry
points
which
are
usually
the
highest
qualification,
long
main
thread
usage
and.
A
A
And,
in
addition,
give
some
information
about
whether
a
sound
the
scripts
called
layout
trashing
like
forced
style
and
layouts,
and
give
information
about
how
how
much
time
was
spent
in
style
and
rendering
in
in
style
and
layout
and
perhaps
additional
color
like
did
it
actually
block
an
event.
A
Event:
timing:
how
long
till
the
presentations
of
the
frame
was
actually
presented
on
on
the
pixel
on
screen?
What
we
call
you
know,
which
is
a
flaky
term
but
like
we
can
give
some
indication
of
that
and
anyway,
that's
about
it.